High Nitrogen Low Nickel Copper Free Austenitic Stainless Steel

A technology of austenitic stainless steel and high nitrogen, which is applied in the field of steel rolling to achieve the effects of low defect occurrence rate, excellent product quality and improved cold working performance

Active Publication Date: 2022-06-03
广西柳钢中金不锈钢有限公司 +1
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Problems solved by technology

[0004] The invention provides a high-nitrogen, low-nickel, copper-free austenitic stainless steel to solve the problem of serious martensitic transformation hardening degree of nickel-saving austenitic stainless steel in cold working

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  • High Nitrogen Low Nickel Copper Free Austenitic Stainless Steel

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Embodiment Construction

[0015] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the present invention is now described.

[0018] The chemical composition of the high nitrogen and low nickel copper-free austenitic stainless steel of the present invention is: C0.12~0.16%, Si0.40~

[0020] Chromium combines with oxygen to form corrosion-resistant Cr

[0023] Chromium equivalent Creq=%Cr+1.5×(%Si)

[0030] AOD smelting is divided into four stages: chemical steel stage, oxidation stage, reduction stage and refining stage. AOD tons of steel raw materials into the furnace:

[0033] The billet heating temperature system: the temperature of the preheating section is 650-800 °C, the temperature of the heating section is 1220-1260 °C, and the temperature of the soaking section is 650-800 °C.

[0038] The yield strength of the steel strip after annealing is Rp0.2 / MPa≥440Mpa, the tensile strength Rm≥950Mpa, and the elongation after breaking A≥

[0039]...

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Abstract

The invention provides a high-nitrogen, low-nickel, copper-free austenitic stainless steel. The components are: C: 0.12-0.16%wt%, Si: 0.40-0.50%wt%, Mn: 8.0-10.0%wt%. , P: ≤0.045%wt%, S≤0.005%wt%, Cr: 14.5-15.0%wt%, Ni: 1.0-1.3%wt%, N: 0.18-0.20%, and the rest are Fe and unavoidable impurity elements. The present invention solves the problem of serious transformation hardening degree of nickel-saving austenite cold-worked martensite while reducing the production cost of the enterprise, optimizes the cold-working performance of the product and improves the limit reduction rate of the first cold rolling, and reduces the risk of cold-rolled cracking quality and economical efficiency. loss.

Description

High Nitrogen Low Nickel Copper Free Austenitic Stainless Steel technical field The present invention relates to steel rolling field, be specifically related to the smelting, rolling of stainless steel, especially a kind of high nitrogen low nickel copper-free Austrian Tensitic stainless steel. Background technique Nickel-saving austenitic stainless steel is a chromium-manganese-nitrogen austenitic alloy developed by manganese and nitrogen to replace scarce and expensive nickel elements. Tensitic stainless steel, because of its good corrosion resistance and high and low temperature performance, is widely used in domestic decoration and pipe making industries. The number of varieties developed and product output of stainless steel enterprises are increasing rapidly year by year. Nickel-saving austenitic stainless steel is a typical metastable For austenitic stainless steel, a large amount of deformation-induced martensite will be generated during cold deformation, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/02C21D8/02
CPCC22C38/58C22C38/02C22C38/001C21D8/0205C21D8/0226C21D8/0247
Inventor 曾垚罗庆革杨剑洪刘川俊陈小龙王碧罗兴壮钱学海田宇航胡中吴海林文宪刚王伦王太平
Owner 广西柳钢中金不锈钢有限公司
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